Sheet-metal hub.



PATENTED APR. 21, 1903-.

J. MAGPHAIL. SHEET METALTHUB. Al PLIGATION FILED'SEPT. 24. 1902.

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No. 725.976. PATENTED APR. 21, 1903.

' J. MAGPHAIL.

SHEET "METAL HUB.

APELIOATION FILED SEPT. 24. 1902v N0 MODEL. 2 SHEETS-SHEET 2.

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UNITED STATES-PATENT CFFICE.

JAMES MACPI-IAIL, OF BLUE ISLAND, ILLINOIS, ASSIGNOR TO INTERNA- TIONALHARVESTER COMPANY, OF CHICAGO, ILLINOIS, A CORPO- RATION OF NEW JERSEY.Y A

SHEET-METAL HUB.

SPECIFICATION forming part of Letters Patent N 0. 725,976, dated April21, 1903.

Application filed September'Z l, 1902. Serial No. 124,667. (No model.)

To ctZZ whom it may concern.- 7

Be it known that I, JAMES MAOPHAIL, a resident of Blue Island, in thecounty of Cook and State of Illinois, have invented certain new anduseful Improvements in Sheet-Metal Hubs; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same.

The invention relates to the construction of metalwheels, moreespecially such as are intended for agricultural machinery; and itconsists in an improved manner of making the hub of the wheel, wherebygreater economy in the manufacture is secured and a simpler lighterconstruction is obtained without impairing the strength of the wheel.

As heretofore constructed .metal wheels have had their hubs formed ofmalleable or gray iron or seamlesstubes, and the spokesockets havenecessarily been bored or punched individually by slow and expensiveradially-operating machines. In the present invention this tedious andcostly operation is done away with, and the spoke holes or sockets areall formed simultaneously by an ordinary gangpunch at a-single stroke ofthe machine while the metal is straight and flat.

A further feature of the invention is that the hub of the wheel isformed of layers of sheet metal one within another that are rivetedtogether by means of the spokes, which pass "clear through all thelayers and have rivet-heads formed on them on the inner and outersurfaces of the hub. The layers are thus secured together entirely bythe spokes without the employment of other rivets or fastenings. i

The invention is illustrated in the accompanying drawings, wherein-1 IFigure 1 is a cross-section of ahub where the layers are formed by asingle strip with its ends overlapped for the entire circumference ofthe hub. Fig; 2 is a similar section of a hub where the layers onlyextend around the circumference for little more than the distancebetween two spokes. Fig. 3 is a similar section of a hub in all respectslike that of Fig. 2,- except that the inside surface of the hub issmooth and concentric. Fig. 4. is a longitudinal section of a hub,showing a convenient and effective way of securing the strips to thesleeve or barrel of the hub. Figs. .5, 6, and 7 are side viewsof stripsformed .to make the hubs of Figs. 1, 2,-and 3, respec tively. Figs. 8,9, and 10 are central longitudinal sections of Figs. 5, (i, and '7,respectively. Fig. 11 is a cross-section of a form of hub where the.layers are made out of sepa rate strips instead of a single strip withits ends overlapped, and Figs. 12 and 13 are side "iews of theindividual strips in the form shown in Fig. 11.

Referring to the views, a denotes the sleeve or barrel of the hub, and ba ring which is riveted to one end of the sleeve. The ring is providedwith an inwardly-projecting flange c, and the opposite end of the sleevehas a similar flange d. The part of the hub to which the spokes e aresecured is formed of layers of sheet metal inclosed one within another.These layers may be formed, as shown in Fig. 11, of separate strips f fof sheet metal bent into circular forrnwith their ends abutting flushtogether and arranged to break joints, as shown, or they may be formedout of a single strip 9 of metal which is similarly bent, but has itsends overlapped to form the layers, as shown in Figs. 1, 2, and 3. InFigs. 1 and 11 the entire circumference of the hub is formed of layers;but in Figs. 2 and 3 the layers do not extend all the way around, and itwill therefore be understood that the hub may be wholly or partly formedof such layers. In the construction shown in Figs. 5 and 8 the stripg isbent or indented, as at h, at about the middle of its length, and whencoiled or rolled up into circular form the whole circumference will beformed of two layers and the inner andouter surfaces will be'smooth andconcentric, as shown in Fig. 1. In the constructions shown in Figs. 6 to10 the indentation h is made near one end, so that when coiled or rolledup into circular form the ends will overlap only, so that two layersextend part way around the circumference and the outer surface will besmooth in one case (see Fig. 2) and the inner surface in the other, (seeFig. 3;) but the principle of construction is precisely the same inboth. Inthe process of manufacture these strips have lines of holes ipunched in them, as-before explained, by a single stroke of an ordinarygang-punch. The holes are properly spaced apart to coincide when thestrips are bent and overlapped into circular form, sothatin thecompleted hub they form the sockets for the spokes 6. These spokes aresecured in all but the form shown in Fig. 11 in a manner that is notuncommon in this class of devicesthat is to say, their inner ends arepassed through the holes 1', and having been previously provided withcollarsj near the ends they are upset, as shown at it. This constitutesthe means for securing the spokes to the wheel-hub and also the meansand preferably the only means for riveting the several layers orstripscomposing the hub together.

In the form shown in Fig.11 the spokes are provided at their inner endswith heads Zm of different diameters corresponding, respectively, to thelarge and small holes 70 7 in the strips f andf. In this form of hub Iprefer to make the holes in the inner strip larger than those in theouter strip, and by making the ends of the spokes with thedifferent-sized heads above described a very strong and secure fasteningis effected when the ends of the spokes are upset to complete theriveting.

Having thus described my invention, what I claim is- In a metal wheel, ahub formed of layers of sheet metal bent into circular form, said layersbeing riveted together by means of the spokes of the wheel.

2. In a metal wheel, a hub formed of layers of sheet metal bent intocircular form, one within another, said layers being riveted together bymeans of the spokes of the Wheel, the rivet-holes of the inner layerbeing larger than those of the outer layer, and the spokes havingdifferent-sized heads to correspond with the holes.

3. In a metal wheel, a hub formed of layers of sheet metal bent intocircular form, one within another, combined with spokes passing throughsaid layers and having heads on opposite sides of the same, whereby saidspokes serve as rivets to secure the layers together without theemployment of other rivets or fastenings.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES MAOPHAIL.

\Vitnesses:

CHAS. N. CHAMBERS, CHAS. W. ALLEN.

